I posted a video on my site using http://wordpress.com/#!/post/
The post is available here http://lanceolot.wordpress.com/2013/09/02/i-forgot-my-phone/
It is a youtube embed with a simple comment. I cannot put a featured image as that would then duplicate on my Visual theme homepage and the posting option does not let you do this unless you use the full dashboard option. The post is a video embed so it also has no 'normal' image.
Unfortunately the Facebook publicise option has now simply taken the first image it finds on the url - which just happens to be the most recent Like I have. So now the Facebook posting has a totally unrelated image next to the post information (all correct).
According to FB debug, the 'og:image' tag has not been explicitly set which is correct, but shouldn't WordPress.com at least set this tag in instances where there is no featured image and no image directly posted in the article...
Even setting this tag to a "blank" image would be favourable to having a totally unrelated image being associated with a post.
This issue has also happened when I created a post with no image or featured image - i.e. a plain text post... it simply took an unrelated image off the webpage and used that... when I explicitly did not want an image associated with the post.
Perhaps someone has figured out how to do this properly or has a workaround?
The blog I need help with is lanceolot.wordpress.com.